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HOM AKE ROY R. CEL==LAN ~ U(~~rh7~~CI6 Fm.~ ENVIRONMENTAL, HEALTH, SAFETY CORPORATE MANAGER `~•. ~':' 'off ANO GOVERNMENT AFFAIRS RECLAMATION AUG 2 ? 1001 August 15, 2001 Dirisron - PAC A`''~lCp ollV7in¢rakandpealagp YJCItl V 6:.Y~ QI-1-1C~ PUELIC PILE C®~~ ~F+ILE: fit.- lq ~~ - Zi s Received State of Colorado SITL: piydlGW 9 IIq,I M.A./ Division of Minerals and Geology r' I ~,I ~ LL y Durango Field Office 1~c~`'wy ny'Q~"ay rtncy>; AUG ~ n 701 Camino Del Rio, Room 125 ( ( I Durango, CO 81301 ~~~ ~Bf Attn: Mr. Steve S. Shuey, Reclamation Specialist ~hdBWrrofMmara7~8Geo1p8Y RE: Bulldog Mine Reclamation Project July, 2001 Monthly Monitoring Report Dear Mr. Shuey: Pursuant to the Technical Revisions to the Reclamation Permit for the Bulldog Reclamation Project, this is the forty-fourth monthly report pertaining to 1) installation and operation of an infiltration trench to accommodate seepage from the 9360 adit, and 2) closing the valve at the 9360 adit plug. The Division of Minerals and Geology (DMG1, in a letter dated March 8, 1999, issued a conditional approval for Homestake Mining Company (HMC) to close the valve at the 9360 adi[ plug. Subsequent to DMG's approval, HMC closed the valve to the adit plug on April 1, 1999. Since closure of the adit plug valve, no flow has been directed into the infiltration trench. Monitoring of the hydraulic conditions behind the adit plug indicated that as of August 25, 1999, conditions had stabilized lie pressure measurements stabilizedl• As a result, DP,AG approved initiation of the planned tracer test (Ref: Letter from WMCI to Mr. Steve Shuey, dated August 27, 19991• The tracer test subsequently began on September 9, 1999. With the initiation of the tracer test, HMC is committed to the monitoring summarized in Table 1 in accordance with the approved Technical Revisions. The revised monitoring program was initiated in September 1999. A summary of the monthly monitoring data is presented in Table 2. Based on the required visual inspection around the adit plug, the plug is impounding water behind It with no signs of seepage and/or development of seeps around the portal area. A pressure measurement and visual observation was completed of the 9360 adit plug and portal on July 13, 2001 and recorded in Table 3. As part of this monthly report and in accordance with the 9360 Level Adit Closure Monitoring Plan, dated April 1998, Windy Gulch monitoring was continued during this period. Water levels in the Creede Formation Well, located upslope of the 9360 Adit, have been recorded continuously since its installation, and data for the last year are presented graphically in Figure 1. Flow data for the WGL Weir has been recorded continuously with an automated datalogger since April 17, 2001. Flow data for the WGL Weir are presented in Figure 2, however the stream was dry eliminating any possibility of obtaining a water sample or flow data in .July. HOMESTAKE MINING COMPANY P.O. BO%9B • GRANTS. NM B]020-00~~